| 101955 Bennu (1999 RQ36) |
| Classification: Apollo [NEO, PHA] SPK-ID: 2101955 |
[ hide orbit diagram ]
For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.
Orbital Elements at Epoch 2455562.5 (2011-Jan-01.0) TDB
Reference: JPL 97 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2037451084785423 | 2.2082e-08 | |
| a | 1.126391025934071 | 4.0261e-11 | au |
| q | .8968943641658774 | 2.486e-08 | au |
| i | 6.034939533607825 | 2.8213e-06 | deg |
| node | 2.060867329373625 | 3.9444e-06 | deg |
| peri | 66.22306846088361 | 6.0706e-06 | deg |
| M | 101.7039479473255 | 2.6478e-06 | deg |
| tp | 2455439.141945784743
(2010-Aug-30.64194578) | 3.2088e-06 | TDB |
| period | 436.6487281348487
1.20 | 2.3411e-08
6.41e-11 | d
yr |
| n | .8244613502889271 | 4.4203e-11 | deg/d |
| Q | 1.355887687702265 | 4.8464e-11 | au |
|
Additional Model Parameters
| Parameter | Value | Uncertainty (1-sigma) |
| A2 [EST] | -4.614425168815923E-14 | 2.533E-16 |
| ALN [SET] | 1 | n/a |
| AMRAT [SET] | 3.07E-6 | n/a |
| NK [SET] | 0 | n/a |
| NM [SET] | 2.25 | n/a |
| NN [SET] | 0 | n/a |
| R0 [SET] | 1 | n/a |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
20.19 |
|
0.06 |
Hergenrother, C.W. et al. Icarus 226, 663-670 (2013) |
|
| magnitude slope |
G |
-0.08 |
|
0.02 |
Hergenrother, C.W. et al. Icarus 226, 663-670 (2013) |
|
| diameter |
diameter |
0.492 |
km |
0.020 |
Nolan, M.C., et al., Icarus 226, 629-640 (2013) |
|
| extent |
extent |
0.565 x 0.535 x 0.508 |
km |
0.010 x 0.010 x 0.052 |
Nolan, M.C., et al., Icarus 226, 629-640 (2013) |
|
| GM |
GM |
5.2e-9 |
km^3/s^2 |
0.9e-9 |
Chesley, S.R., et al., Icarus 235, 5-22 (2014) |
|
| bulk density |
density |
1.26 |
g/cm^3 |
0.07 |
Chesley, S.R., et al., Icarus 235, 5-22 (2014) |
|
| rotation period |
rot_per |
4.297 |
h |
0.002 |
Nolan, M.C., et al., Icarus 226, 629-640 (2013) |
|
| pole direction |
pole |
87/-65 |
|
4 |
Nolan, M.C., et al., Icarus 226, 629-640 (2013) |
|
| geometric albedo |
albedo |
0.046 |
|
0.005 |
Emery, J.P., et al., Icarus 234, 17-35 (2014) |
|
| B-V |
BV |
0.64 |
|
0.04 |
Hergenrother, C.W. et al. Icarus 226, 663-670 (2013) |
|
| U-B |
UB |
0.16 |
|
0.05 |
Hergenrother, C.W. et al. Icarus 226, 663-670 (2013) |
|
| I-R |
IR |
-0.33 |
|
0.06 |
Hergenrother, C.W. et al. Icarus 226, 663-670 (2013) |
|
| SMASSII spectral type |
spec_B |
B |
|
n/a |
Clark, B.E., et al., Icarus 216, 462-475 (2011) |
|
|
| 101955 Bennu | Discovered 1999 Sept. 11 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. |
| Bennu was an Egyptian mythological figure associated with Osiris, Atum and Ra. This minor planet is the target of the OSIRIS-REx sample return mission. OSIRIS-REx's Touch-and-Go Sampler evokes Bennu's image as a heron. Name suggested by Michael Toler Puzio (b. 2004) via a naming contest for students. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: MPC batch dated 2013-04-25 | Last Updated: 2013-04-29 |
|
[ show close-approach data ]
|
